<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="../react18/react.development.js"></script>
  <script src="../react18/react-dom.development.js"></script>
  <script src="../react18/babel.min.js"></script>
</head>

<body>
  <div id="app"></div>
  <script type="text/babel">

/* 
    如果发生事件的时候,需要获取自身元素的时候,可以直接使用e.target
*/

class Parent extends React.Component{
  state={
    name
  }
      render(){
        
        return (
          <div>
            <input type="text" onChange={this.handleChange}  />
     
          </div>
        )
      }

      handleChange=(e)=>{
     
        const{value} = e.target
        this.setState({name:value})
      }

    }
 const root=ReactDOM.createRoot(document.getElementById('app'))
 root.render(<Parent/>)


  </script>
</body>

</html>